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In the data of several infrasound stations in Europe, manifestations of the explosion of the Romania meteoroid were detected. The azimuth angle, celerity, duration, amplitude, and energy of the infrasound signal have been estimated. The composition, mass, volume, and sizes of the meteoroid are discussed. 相似文献
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L. F. Chernogor 《Geomagnetism and Aeronomy》2017,57(1):119-120
We show that telluric currents have no effect on the formation of macrofaults in the Earth’s crust or on implementation of the intensification regime. This is mainly associated with the weakness of telluric currents and induction of the geomagnetic field. 相似文献
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Geomagnetism and Aeronomy - Regular and quasi-periodic local time and seasonal variations in the electron density in the maximum of the ionospheric F2 layer during low solar activity in 2016 are... 相似文献
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Geomagnetism and Aeronomy - The time variations in the Doppler spectra at frequencies of 3.2 and 4.2 MHz on the day of fall of the Lipetsk meteoroid (near Lipetsk town, Russia) on June 21, 2018,... 相似文献
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Data received from a network of ionosondes located at distances of 1500–3100 km from the Chelyabinsk meteorite site are used to analyze ionospheric disturbances at a height of approximately 300 km following the flight and explosion of the space body. The fall of the meteoroid is believed to be accompanied by the generation of gravitational waves in the neutral atmosphere and traveling ionospheric disturbances. The velocity and period of the latter are 600–700 m/s and 70–135 min, respectively; the amplitude of relative electron concentration disturbances is 10–20%. There is evidence of the 6–7 h ionospheric presence of wave electron concentration disturbances with relative amplitude of 10–20%, which could have been caused by long-living whirlwinds in the upper atmosphere. 相似文献
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Wave-like disturbances (WDs) with periods of 30–120 min at altitudes of 125–500 km (100–1000 km in individual experiments) have been studied. The measurements of total duration more than 400 h have been performed under the conditions of a quiet ionosphere as well as during magnetic and ionospheric storms and two solar eclipses. It has been indicated that WDs exist almost permanently in the ionosphere. The effect of powerful energy sources leads to a change in the WD character and to variations in the WD spectral composition and amplitudes. The latter substantially vary during a day and depending on the disturbance of the ionosphere. The WD relative amplitudes vary from several percent to several tens of percent. 相似文献
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L. F. Chernogor 《Geomagnetism and Aeronomy》2008,48(5):652-673
Backgrounds of adaptive Fourier transform and analytical wavelet transform have been briefly described in comparison with traditional Fourier transform using a time window. As an example, all three transforms are used to analyze quasiperiodic wave-like processes in the ionosphere, which accompanied the passage of the solar terminator and rocket launch from the Plesetsk site. The advantages of adaptive Fourier transform and analytical wavelet transform as compared to traditional Fourier transform, which make it possible to reliably detect wave-like disturbances against a background of noise at a signal-to-noise ratio not less than 0.1, have been demonstrated. 相似文献
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Geomagnetic field fluctuations near Kharkov,which accompanied rocket launches from the Baikonur site
L. F. Chernogor 《Geomagnetism and Aeronomy》2009,49(3):384-396
The observations of the geomagnetic field variations in the range of periods 1–1000 s, which accompanied the launches of 65 Soyuz and Proton rockets from the Baikonur site in 2002–2006, have been analyzed. The measurements were performed near Kharkov (the distance from the launching site is R ≈ 2100 km). Three groups of disturbances, with delays of 6–7, 30–70, and 70–130 min dependent on the time of day, have been revealed. The disturbance duration was 10–30, 50–70, and 45–70 min, respectively. Periods of 3–6, 6–12, and 6–12 min, respectively, predominated in the geomagnetic pulsations. The amplitudes of these pulsations reached 3–6 nT. The physical model of the observed geomagnetic disturbances, which generally agrees with the measurements, has been proposed. 相似文献